Observation Module And Associated Device For Detecting The Presence of At Least One Particle Of An Aerosol

Abstract

The invention relates to an observation module for a device for detecting the presence of at least one particle of an aerosol in a stream, the module comprising at least: —A chamber ( 11 ) through which flows in service the stream to be analysed, —A light source ( 12 ) able to generate a light beam that in service passes through the stream to be analysed, the light source ( 12 ) being a square-fibre fibre laser, —An optical cell ( 14 ) for collecting a light emission resulting from an excitation of at least the particle of the aerosol by the light source. The invention also relates to a corresponding device.

1 . An observation module for a device for detecting the presence of at least one particle of an aerosol in a stream, the module comprising at least:
 a chamber through which flows, in service, the stream;   a light source able to generate a light beam passing through, in service, the stream, the light source being a square-fibre laser; and   an optical cell comprising at least one optical sensor for collecting a light emission resulting from an excitation of at least the particle of the aerosol by the light source.   
     
     
         2 . The observation module according to  claim 1 , designed such that, in service, the stream passes through the chamber substantially vertically. 
     
     
         3 . The observation module according to  claim 1 , wherein the light source is arranged such that a general direction of the light beam extends in a direction which is substantially horizontal. 
     
     
         4 . The observation module according to  claim 1 , wherein the optical sensor is arranged such that an optical axis of the optical sensor extends in a direction which is substantially horizontal. 
     
     
         5 . The observation module according to  claim 1 , wherein the optical sensor and the light source are arranged such that, respectively, an optical axis of the optical sensor and a general direction of the light beam generated by the light source extend substantially orthogonally to one another. 
     
     
         6 . The observation module according to  claim 1 , comprising at least one optical trap associated with the light source and/or the optical sensor. 
     
     
         7 . The observation module according to  claim 1 , comprising means a processor for processing information generated by the optical cell. 
     
     
         8 . The observation module according to  claim 7 , wherein the processor is configured to characterise the particles of the test aerosol and/or to carry out a simultaneous counting of the particles of the test aerosol. 
     
     
         9 . A device for detecting the presence of at least one particle of an aerosol in a stream, the device comprising an observation module according to  claim 1  and a preparation module connected to said observation module. 
     
     
         10 . An application of the observation module according to  claim 1 , for monitoring a ventilation network of a nuclear industry site. 
     
     
         11 . An application of the observation module according to  claim 1 , for detecting at least sodium fluorescein.